Non readable characters IDE

Development Tools IDE 1.x
1

Hello,
I got into arduino world recently and I have a problem with the IDE.
Whenever i write my own code or just try do modify one form the internet characters on my screen turn into something like on the photo:

What can I do to fix it?
Thanks you all for attention :slight_smile:

2

Is that Arduino IDE version 1.0.5? I think this issue has been solved in more recent versions of the IDE.

3

I downloaded it from the ubuntu repositories, I have up to date file and from arduino site but whatever I do it won't install. How do I get intsall.sh to run?

edit.
Okay, I figured it out.
Thanks anyway :slight_smile:

4

Nalesnik:
I downloaded it from the ubuntu repositories

Yes, unfortunately the Arduino developers have not provided sufficient license documentation for more recent versions to be available in the ubuntu repositories(Update license.txt for 1.6.0+ directory structure by maqifrnswa · Pull Request #2703 · arduino/Arduino · GitHub).

Nalesnik:
, I have up to date file and from arduino site but whatever I do it won't install. How do I get intsall.sh to run?

I don't have any experience with that, does any of the information in https://www.arduino.cc/en/Guide/Linux help you?